class People:
    def __init__(self, name, age):
        self.__name = name
        self.__age = age

    def run(self):
        print('{}正在跑步'.format(self.__name))


class Student(People):
    def __init__(self, name, age, classroom):
        super().__init__(name, age)
        self.__classroom = classmethod


s = Student('小明', 15, '高一2班')
s.run()
